A new ignition system where a two layered centre core ignition system having a pyrotechnic composition is given.

介绍一种带烟火剂双层中心点火管的新型点火系统。

youdao

A new ignition system where a two layered centre core ignition system having a pyrotechnic composition is given.

介绍一种带烟火剂双层中心点火管的新型点火系统。

youdao